Sulc values in left and right inflated hemispheres

The 'sulc' conveys information on how far removed a particular vertex point on a surface is from a hypothetical "mid-surface" that exists between the gyri and sulci. This surface is chosen so that the "mean" of all these displacements is zero. The 'sulc' gives a indication then of linear distance and displacements, i.e. how "deep" and how "high" are brain folds

Interactive view of cortical thickness in left hemisphere

Thickness of the outer gray matter cortical ribbon of the brain

Metrics and provenance information

The quantitative metrics are also used in the Freesurfer group report.